<template>
  <div class="app-container">
    <el-form label-width="120px">
      <el-form-item label="学生头像">
        <!-- 头衔缩略图 -->
        <pan-thumb :image="student.avatar"/>
        <!-- 文件上传按钮 -->
        <el-button type="primary" icon="el-icon-upload" @click="imagecropperShow=true">更换头像
        </el-button>
        <!--
    v-show：是否显示上传组件
    :key：类似于id，如果一个页面多个图片上传控件，可以做区分
    :url：后台上传的url地址
    @close：关闭上传组件
    @crop-upload-success：上传成功后的回调 -->
        <image-cropper
          v-show="imagecropperShow"
          :width="300"
          :height="300"
          :key="imagecropperKey"
          :url="BASE_API+'/eduOss/file/upload'"
          field="file"
          @close="close"
          @crop-upload-success="cropSuccess"/>

      </el-form-item>
      <el-form-item label="学生名称">
        <el-input v-model="student.name"/>
      </el-form-item>
      <el-form-item label="学号">
        <el-input v-model="student.number"/>
      </el-form-item>
      <el-form-item label="学院">
        <el-select
          v-model="student.academy"
          placeholder="请选择"
          @change="getMajor">
          <el-option
            v-for="academy in AcaList"
            :key="academy.id"
            :label="academy.name"
            :value="academy.id"

          />
        </el-select>
      </el-form-item>

      <el-form-item label="专业">
        <el-select
          v-model="student.major"
          placeholder="请选择"
          @change="getClass">
          <el-option
            v-for="major in MajorList"
            :key="major.id"
            :label="major.name"
            :value="major.id"

          />
        </el-select>
      </el-form-item>
      <el-form-item label="班级">
        <el-select
          v-model="student.classs"
          placeholder="请选择"
      >
          <el-option
            v-for="cla in classList"
            :key="cla.id"
            :label="cla.name"
            :value="cla.id"

          />
        </el-select>
      </el-form-item>
      <el-form-item label="学生排序">
        <el-input v-model="student.sort" controls-position="right" />
      </el-form-item>

      <el-form-item label="学生简介">
        <el-input v-model="student.intro" :rows="10" type="textarea"/>
      </el-form-item>

      <el-form-item>
        <el-button :disabled="saveBtnDisabled" type="primary" @click="saveOrUpdate">保存</el-button>
      </el-form-item>
    </el-form>
  </div>
</template>

<script>
import ImageCropper from "@/components/ImageCropper"
import PanThumb from "@/components/PanThumb"
import Academy from "../../../api/edu/Academy";
let defaultForm = {
  name: '',
  classs:'',
  major:'',
  academy:'',
  number:'',
  sort: 0,
  intro: '',
  avatar: ''
}
import student from "../../../api/edu/student";
import classs from "../../../api/edu/classs";
import major from "../../../api/edu/major";
export default {
  name: "add",
  components: { ImageCropper, PanThumb },
  watch: {//监听 to  from路由变化方式
    $route(to, from) {
      this.init()
    }
  },
  created() {
    if (this.$route.params && this.$route.params.id) {
      const id = this.$route.params.id
      this.fetchDataById(id)
    }
    this.getAcaList()
  },
  data() {
    return {
      student: defaultForm,
      saveBtnDisabled: false, // 保存按钮是否禁用,
      imagecropperKey:0,
      BASE_API:process.env.BASE_API,
      imagecropperShow:false,
      AcaList:'',
      MajorList:'',
      classList:'',
    }
  },

  methods: {
    getMajor(value){
      major.getClassByAcaId(value).then(res=>{
        this.MajorList=res.data.majorList

      })

    },
    getClass(value){
      classs.getClassBymajor(value).then(res=>{
        this.classList=res.data.classs
      })
    },

    getAcaList(){
      Academy.getAllAcaList().then(res=>{
        this.AcaList=res.data.acaList
      })

    },

    cropSuccess(data){
      this.imagecropperShow = false
      this.student.avatar = data.url
      // 上传成功后，重新打开上传组件时初始化组件，否则显示上一次的上传结果
      this.imagecropperKey = this.imagecropperKey + 1

    },
    close(){
      this.imagecropperShow = false
      // 上传失败后，重新打开上传组件时初始化组件，否则显示上一次的上传结果
      this.imagecropperKey = this.imagecropperKey + 1

    },
    init() {
      if (this.$route.params && this.$route.params.id) {
        const id = this.$route.params.id
        this.fetchDataById(id)
      } else {
        // 使用对象拓展运算符，拷贝对象，而不是引用，
        // 否则新增一条记录后，defaultForm就变成了之前新增的teacher的值
        this.student = { ...defaultForm }
      }
    },
    updateData() {
      this.saveBtnDisabled = true
      student.updateById(this.student).then(response => {
        return this.$message({
          type: 'success',
          message: '修改成功!'
        })
      }).then(resposne => {
        this.$router.push({ path: '/student/studentlist' })
      }).catch((response) => {
        // console.log(response)
        this.$message({
          type: 'error',
          message: '保存失败'
        })
      })
    },
    fetchDataById(id) {
      student.getById(id).then(response => {
        this.student = response.data.student
      }).catch((response) => {
        this.$message({
          type: 'error',
          message: '获取数据失败'
        })
      })
    },
    saveOrUpdate() {

      this.saveBtnDisabled = true
      if (!this.student.id) {
        this.saveData()
      } else {
        this.updateData()
      }
    },
    // 保存
    saveData() {
      student.save(this.student).then(response => {
        defaultForm={}
        return this.$message({
          type: 'success',
          message: '保存成功!'
        })

      }).then(resposne => {
        this.$router.push({ path: '/student/studentlist' })
      }).catch((response) => {
        // console.log(response)
        this.$message({
          type: 'error',
          message: '保存失败'
        })
      })
    }

  }
}
</script>

<style scoped>

</style>
